Field worldmanagerfield = MultiverseCore.class.getDeclaredField("worldManager");
worldmanagerfield.setAccessible(true);
worldmanagerfield.set(core, wm);
// Set playerListener
MVPlayerListener pl = PowerMockito.spy(new MVPlayerListener(core));
Field playerlistenerfield = MultiverseCore.class.getDeclaredField("playerListener");
playerlistenerfield.setAccessible(true);
playerlistenerfield.set(core, pl);
// Set entityListener